/*
 * Copyright (c) 2013, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include "third_party/blink/renderer/platform/graphics/bitmap_image.h"

#include <array>

#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/numerics/safe_conversions.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/simple_test_tick_clock.h"
#include "base/time/time.h"
#include "cc/paint/image_provider.h"
#include "cc/paint/skia_paint_canvas.h"
#include "cc/tiles/mipmap_util.h"
#include "media/media_buildflags.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/platform/graphics/bitmap_image_metrics.h"
#include "third_party/blink/renderer/platform/graphics/deferred_image_decoder.h"
#include "third_party/blink/renderer/platform/graphics/image_observer.h"
#include "third_party/blink/renderer/platform/graphics/test/mock_image_decoder.h"
#include "third_party/blink/renderer/platform/scheduler/test/fake_task_runner.h"
#include "third_party/blink/renderer/platform/testing/testing_platform_support_with_mock_scheduler.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/wtf/shared_buffer.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkImage.h"
#include "ui/gfx/geometry/rect_f.h"

namespace blink {
namespace {

class FrameSettingImageProvider : public cc::ImageProvider {
 public:
  FrameSettingImageProvider(size_t frame_index,
                            cc::PaintImage::GeneratorClientId client_id)
      : frame_index_(frame_index), client_id_(client_id) {}
  ~FrameSettingImageProvider() override = default;

  ImageProvider::ScopedResult GetRasterContent(
      const cc::DrawImage& draw_image) override {
    DCHECK(!draw_image.paint_image().IsPaintWorklet());
    auto sk_image =
        draw_image.paint_image().GetSkImageForFrame(frame_index_, client_id_);
    return ScopedResult(cc::DecodedDrawImage(
        sk_image, nullptr, SkSize::MakeEmpty(), SkSize::Make(1, 1),
        draw_image.filter_quality(), true));
  }

 private:
  size_t frame_index_;
  cc::PaintImage::GeneratorClientId client_id_;
};

void GenerateBitmapForPaintImage(cc::PaintImage paint_image,
                                 size_t frame_index,
                                 cc::PaintImage::GeneratorClientId client_id,
                                 SkBitmap* bitmap) {
  CHECK(paint_image);
  CHECK_GE(paint_image.FrameCount(), frame_index);

  SkImageInfo info =
      SkImageInfo::MakeN32Premul(paint_image.width(), paint_image.height());
  bitmap->allocPixels(info, paint_image.width() * 4);
  bitmap->eraseColor(SK_AlphaTRANSPARENT);
  FrameSettingImageProvider image_provider(frame_index, client_id);
  cc::SkiaPaintCanvas canvas(*bitmap, &image_provider);
  canvas.drawImage(paint_image, 0u, 0u);
}

}  // namespace

// Extends TestingPlatformSupportWithMockScheduler to add the ability to set the
// return value of MaxDecodedImageBytes().
class TestingPlatformSupportWithMaxDecodedBytes
    : public TestingPlatformSupportWithMockScheduler {
 public:
  TestingPlatformSupportWithMaxDecodedBytes() {}
  TestingPlatformSupportWithMaxDecodedBytes(
      const TestingPlatformSupportWithMaxDecodedBytes&) = delete;
  TestingPlatformSupportWithMaxDecodedBytes& operator=(
      const TestingPlatformSupportWithMaxDecodedBytes&) = delete;
  ~TestingPlatformSupportWithMaxDecodedBytes() override {}

  void SetMaxDecodedImageBytes(size_t max_decoded_image_bytes) {
    max_decoded_image_bytes_ = max_decoded_image_bytes;
  }

  size_t MaxDecodedImageBytes() override { return max_decoded_image_bytes_; }

 private:
  size_t max_decoded_image_bytes_ = Platform::kNoDecodedImageByteLimit;
};

class BitmapImageTest : public testing::Test {
 public:
  class FakeImageObserver : public GarbageCollected<FakeImageObserver>,
                            public ImageObserver {
   public:
    FakeImageObserver()
        : last_decoded_size_(0), last_decoded_size_changed_delta_(0) {}

    void DecodedSizeChangedTo(const Image*, size_t new_size) override {
      last_decoded_size_changed_delta_ =
          base::checked_cast<int>(new_size) -
          base::checked_cast<int>(last_decoded_size_);
      last_decoded_size_ = new_size;
    }
    bool ShouldPauseAnimation(const Image*) override { return false; }
    void AsyncLoadCompleted(const Image*) override { NOTREACHED(); }

    void Changed(const Image*) override {}

    size_t last_decoded_size_;
    int last_decoded_size_changed_delta_;
  };

  void TearDown() override { image_.reset(); }

  static Vector<char> ReadFile(const char* file_name) {
    String file_path = test::PlatformTestDataPath(file_name);
    std::optional<Vector<char>> data = test::ReadFromFile(file_path);
    CHECK(data && data->size());
    return std::move(*data);
  }

  // Accessors to BitmapImage's protected methods.
  void DestroyDecodedData() { image_->DestroyDecodedData(); }
  size_t FrameCount() { return image_->FrameCount(); }

  void CreateImage() {
    image_observer_ = MakeGarbageCollected<FakeImageObserver>();
    image_ = BitmapImage::Create(image_observer_.Get());
  }

  void LoadImage(const char* file_name) {
    CreateImage();

    scoped_refptr<SharedBuffer> image_data =
        SharedBuffer::Create(ReadFile(file_name));
    ASSERT_TRUE(image_data.get());

    image_->SetData(image_data, true);
  }

  void LoadBlinkWebTestsImage(const char* relative_path) {
    CreateImage();

    String file_path = test::BlinkWebTestsImagesTestDataPath(relative_path);
    std::optional<Vector<char>> data = test::ReadFromFile(file_path);
    ASSERT_TRUE(data && data->size());
    scoped_refptr<SharedBuffer> image_data =
        SharedBuffer::Create(std::move(*data));
    image_->SetData(image_data, true);
  }

  SkBitmap GenerateBitmap(size_t frame_index) {
    SkBitmap bitmap;
    GenerateBitmapForPaintImage(image_->PaintImageForTesting(), frame_index,
                                cc::PaintImage::kDefaultGeneratorClientId,
                                &bitmap);
    return bitmap;
  }

  SkBitmap GenerateBitmapForImage(const char* file_name) {
    scoped_refptr<SharedBuffer> image_data =
        SharedBuffer::Create(ReadFile(file_name));
    EXPECT_TRUE(image_data.get());
    if (!image_data)
      return SkBitmap();

    auto image = BitmapImage::Create();
    image->SetData(image_data, true);
    auto paint_image = image->PaintImageForCurrentFrame();
    CHECK(paint_image);

    SkBitmap bitmap;
    SkImageInfo info = SkImageInfo::MakeN32Premul(image->Size().width(),
                                                  image->Size().height());
    bitmap.allocPixels(info, image->Size().width() * 4);
    bitmap.eraseColor(SK_AlphaTRANSPARENT);
    cc::SkiaPaintCanvas canvas(bitmap);
    canvas.drawImage(paint_image, 0u, 0u);
    return bitmap;
  }

  void VerifyBitmap(const SkBitmap& bitmap, SkColor color) {
    ASSERT_GT(bitmap.width(), 0);
    ASSERT_GT(bitmap.height(), 0);

    for (int i = 0; i < bitmap.width(); ++i) {
      for (int j = 0; j < bitmap.height(); ++j) {
        auto bitmap_color = bitmap.getColor(i, j);
        EXPECT_EQ(bitmap_color, color)
            << "Bitmap: " << SkColorGetA(bitmap_color) << ","
            << SkColorGetR(bitmap_color) << "," << SkColorGetG(bitmap_color)
            << "," << SkColorGetB(bitmap_color)
            << "Expected: " << SkColorGetA(color) << "," << SkColorGetR(color)
            << "," << SkColorGetG(color) << "," << SkColorGetB(color);
      }
    }
  }

  void VerifyBitmap(const SkBitmap& bitmap, const SkBitmap& expected) {
    ASSERT_GT(bitmap.width(), 0);
    ASSERT_GT(bitmap.height(), 0);
    ASSERT_EQ(bitmap.info(), expected.info());

    for (int i = 0; i < bitmap.width(); ++i) {
      for (int j = 0; j < bitmap.height(); ++j) {
        auto bitmap_color = bitmap.getColor(i, j);
        auto expected_color = expected.getColor(i, j);
        EXPECT_EQ(bitmap_color, expected_color)
            << "Bitmap: " << SkColorGetA(bitmap_color) << ","
            << SkColorGetR(bitmap_color) << "," << SkColorGetG(bitmap_color)
            << "," << SkColorGetB(bitmap_color)
            << "Expected: " << SkColorGetA(expected_color) << ","
            << SkColorGetR(expected_color) << "," << SkColorGetG(expected_color)
            << "," << SkColorGetB(expected_color);
      }
    }
  }

  size_t DecodedSize() { return image_->TotalFrameBytes(); }

  int RepetitionCount() { return image_->RepetitionCount(); }

  scoped_refptr<Image> ImageForDefaultFrame() {
    return image_->ImageForDefaultFrame();
  }

  int LastDecodedSizeChange() {
    return image_observer_->last_decoded_size_changed_delta_;
  }

  scoped_refptr<SharedBuffer> Data() { return image_->Data(); }

 protected:
  Persistent<FakeImageObserver> image_observer_;
  scoped_refptr<BitmapImage> image_;
  ScopedTestingPlatformSupport<TestingPlatformSupportWithMaxDecodedBytes>
      platform_;
};

TEST_F(BitmapImageTest, destroyDecodedData) {
  LoadImage("animated-10color.gif");
  image_->PaintImageForCurrentFrame();
  size_t total_size = DecodedSize();
  EXPECT_GT(total_size, 0u);
  DestroyDecodedData();
  EXPECT_EQ(-static_cast<int>(total_size), LastDecodedSizeChange());
  EXPECT_EQ(0u, DecodedSize());
}

TEST_F(BitmapImageTest, maybeAnimated) {
  LoadImage("gif-loop-count.gif");
  EXPECT_TRUE(image_->MaybeAnimated());
}

TEST_F(BitmapImageTest, isAllDataReceived) {
  scoped_refptr<SharedBuffer> image_data =
      SharedBuffer::Create(ReadFile("green.jpg"));
  ASSERT_TRUE(image_data.get());

  scoped_refptr<BitmapImage> image = BitmapImage::Create();
  EXPECT_FALSE(image->IsAllDataReceived());

  image->SetData(image_data, false);
  EXPECT_FALSE(image->IsAllDataReceived());

  image->SetData(image_data, true);
  EXPECT_TRUE(image->IsAllDataReceived());
}

TEST_F(BitmapImageTest, noColorProfile) {
  LoadImage("green.jpg");
  image_->PaintImageForCurrentFrame();
  EXPECT_EQ(1024u, DecodedSize());
  EXPECT_FALSE(image_->HasColorProfile());
}

TEST_F(BitmapImageTest, jpegHasColorProfile) {
  LoadImage("icc-v2-gbr.jpg");
  image_->PaintImageForCurrentFrame();
  EXPECT_EQ(227700u, DecodedSize());
  EXPECT_TRUE(image_->HasColorProfile());
}

TEST_F(BitmapImageTest, pngHasColorProfile) {
  LoadImage("palatted-color-png-gamma-one-color-profile.png");
  image_->PaintImageForCurrentFrame();
  EXPECT_EQ(65536u, DecodedSize());
  EXPECT_TRUE(image_->HasColorProfile());
}

TEST_F(BitmapImageTest, webpHasColorProfile) {
  LoadImage("webp-color-profile-lossy.webp");
  image_->PaintImageForCurrentFrame();
  EXPECT_EQ(2560000u, DecodedSize());
  EXPECT_TRUE(image_->HasColorProfile());
}

TEST_F(BitmapImageTest, icoHasWrongFrameDimensions) {
  LoadImage("wrong-frame-dimensions.ico");
  // This call would cause crash without fix for 408026
  ImageForDefaultFrame();
}

TEST_F(BitmapImageTest, correctDecodedDataSize) {
  // Requesting any one frame shouldn't result in decoding any other frames.
  LoadImage("anim_none.gif");
  image_->PaintImageForCurrentFrame();
  int frame_size =
      static_cast<int>(image_->Size().Area64() * sizeof(ImageFrame::PixelData));
  EXPECT_EQ(frame_size, LastDecodedSizeChange());
}

TEST_F(BitmapImageTest, recachingFrameAfterDataChanged) {
  LoadImage("green.jpg");
  image_->PaintImageForCurrentFrame();
  EXPECT_GT(LastDecodedSizeChange(), 0);
  image_observer_->last_decoded_size_changed_delta_ = 0;

  // Calling dataChanged causes the cache to flush, but doesn't affect the
  // source's decoded frames. It shouldn't affect decoded size.
  image_->DataChanged(true);
  EXPECT_EQ(0, LastDecodedSizeChange());
  // Recaching the first frame also shouldn't affect decoded size.
  image_->PaintImageForCurrentFrame();
  EXPECT_EQ(0, LastDecodedSizeChange());
}

TEST_F(BitmapImageTest, ConstantImageIdForPartiallyLoadedImages) {
  Vector<char> image_data_binary = ReadFile("green.jpg");

  // Create a new buffer to partially supply the data.
  scoped_refptr<SharedBuffer> partial_buffer = SharedBuffer::Create();
  partial_buffer->Append(
      base::span(image_data_binary).first(image_data_binary.size() - 4));

  // First partial load. Repeated calls for a PaintImage should have the same
  // image until the data changes or the decoded data is destroyed.
  CreateImage();
  ASSERT_EQ(image_->SetData(partial_buffer, false), Image::kSizeAvailable);
  auto image1 = image_->PaintImageForCurrentFrame();
  auto image2 = image_->PaintImageForCurrentFrame();
  EXPECT_TRUE(image1.IsSameForTesting(image2));
  auto sk_image1 = image1.GetSwSkImage();
  auto sk_image2 = image2.GetSwSkImage();
  EXPECT_EQ(sk_image1->uniqueID(), sk_image2->uniqueID());

  // Frame keys should be the same for these PaintImages.
  EXPECT_EQ(image1.GetKeyForFrame(PaintImage::kDefaultFrameIndex),
            image2.GetKeyForFrame(PaintImage::kDefaultFrameIndex));

  // Destroy the decoded data. This generates a new id since we don't cache
  // image ids for partial decodes.
  DestroyDecodedData();
  auto image3 = image_->PaintImageForCurrentFrame();
  auto sk_image3 = image3.GetSwSkImage();
  EXPECT_NE(sk_image1, sk_image3);
  EXPECT_NE(sk_image1->uniqueID(), sk_image3->uniqueID());

  // Since the cached generator is discarded on destroying the cached decode,
  // the new content id is generated resulting in an updated frame key.
  EXPECT_NE(image1.GetKeyForFrame(PaintImage::kDefaultFrameIndex),
            image3.GetKeyForFrame(PaintImage::kDefaultFrameIndex));

  // Load complete. This should generate a new image id.
  scoped_refptr<SharedBuffer> image_data =
      SharedBuffer::Create(image_data_binary);
  image_->SetData(image_data, true);
  auto complete_image = image_->PaintImageForCurrentFrame();
  auto complete_sk_image = complete_image.GetSwSkImage();
  EXPECT_NE(sk_image3, complete_sk_image);
  EXPECT_NE(sk_image3->uniqueID(), complete_sk_image->uniqueID());
  EXPECT_NE(complete_image.GetKeyForFrame(PaintImage::kDefaultFrameIndex),
            image3.GetKeyForFrame(PaintImage::kDefaultFrameIndex));

  // Destroy the decoded data and re-create the PaintImage. The frame key
  // remains constant but the SkImage id will change since we don't cache skia
  // uniqueIDs.
  DestroyDecodedData();
  auto new_complete_image = image_->PaintImageForCurrentFrame();
  auto new_complete_sk_image = new_complete_image.GetSwSkImage();
  EXPECT_NE(new_complete_sk_image, complete_sk_image);
  EXPECT_EQ(new_complete_image.GetKeyForFrame(PaintImage::kDefaultFrameIndex),
            complete_image.GetKeyForFrame(PaintImage::kDefaultFrameIndex));
}

TEST_F(BitmapImageTest, ImageForDefaultFrame_MultiFrame) {
  LoadImage("anim_none.gif");

  // Multi-frame images create new StaticBitmapImages for each call.
  auto default_image1 = image_->ImageForDefaultFrame();
  auto default_image2 = image_->ImageForDefaultFrame();
  EXPECT_NE(default_image1, default_image2);

  // But the PaintImage should be the same.
  auto paint_image1 = default_image1->PaintImageForCurrentFrame();
  auto paint_image2 = default_image2->PaintImageForCurrentFrame();
  EXPECT_TRUE(paint_image1.IsSameForTesting(paint_image2));
  EXPECT_EQ(paint_image1.GetSwSkImage()->uniqueID(),
            paint_image2.GetSwSkImage()->uniqueID());
}

TEST_F(BitmapImageTest, ImageForDefaultFrame_SingleFrame) {
  LoadImage("green.jpg");

  // Default frame images for single-frame cases is the image itself.
  EXPECT_EQ(image_->ImageForDefaultFrame(), image_);
}

TEST_F(BitmapImageTest, GifDecoderFrame0) {
  LoadImage("green-red-blue-yellow-animated.gif");
  auto bitmap = GenerateBitmap(0u);
  SkColor color = SkColorSetARGB(255, 0, 128, 0);
  VerifyBitmap(bitmap, color);
}

TEST_F(BitmapImageTest, GifDecoderFrame1) {
  LoadImage("green-red-blue-yellow-animated.gif");
  auto bitmap = GenerateBitmap(1u);
  VerifyBitmap(bitmap, SK_ColorRED);
}

TEST_F(BitmapImageTest, GifDecoderFrame2) {
  LoadImage("green-red-blue-yellow-animated.gif");
  auto bitmap = GenerateBitmap(2u);
  VerifyBitmap(bitmap, SK_ColorBLUE);
}

TEST_F(BitmapImageTest, GifDecoderFrame3) {
  LoadImage("green-red-blue-yellow-animated.gif");
  auto bitmap = GenerateBitmap(3u);
  VerifyBitmap(bitmap, SK_ColorYELLOW);
}

TEST_F(BitmapImageTest, GifDecoderMultiThreaded) {
  LoadImage("green-red-blue-yellow-animated.gif");
  auto paint_image = image_->PaintImageForTesting();
  ASSERT_EQ(paint_image.FrameCount(), 4u);

  struct Decode {
    SkBitmap bitmap;
    std::unique_ptr<base::Thread> thread;
    cc::PaintImage::GeneratorClientId client_id;
  };

  std::array<Decode, 4> decodes;
  std::array<SkColor, 4> expected_color = {
      SkColorSetARGB(255, 0, 128, 0),
      SK_ColorRED,
      SK_ColorBLUE,
      SK_ColorYELLOW,
  };
  for (int i = 0; i < 4; ++i) {
    decodes[i].thread =
        std::make_unique<base::Thread>("Decode" + std::to_string(i));
    decodes[i].client_id = cc::PaintImage::GetNextGeneratorClientId();

    decodes[i].thread->StartAndWaitForTesting();
    decodes[i].thread->task_runner()->PostTask(
        FROM_HERE, base::BindOnce(&GenerateBitmapForPaintImage, paint_image, i,
                                  decodes[i].client_id, &decodes[i].bitmap));
  }

  for (int i = 0; i < 4; ++i) {
    decodes[i].thread->FlushForTesting();
    VerifyBitmap(decodes[i].bitmap, expected_color[i]);
  }
}

TEST_F(BitmapImageTest, APNGDecoder00) {
  LoadImage("apng00.png");
  auto actual_bitmap = GenerateBitmap(0u);
  auto expected_bitmap = GenerateBitmapForImage("apng00-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

// Jump to the final frame of each image.
TEST_F(BitmapImageTest, APNGDecoder01) {
  LoadImage("apng01.png");
  auto actual_bitmap = GenerateBitmap(9u);
  auto expected_bitmap = GenerateBitmapForImage("apng01-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder02) {
  LoadImage("apng02.png");
  auto actual_bitmap = GenerateBitmap(9u);
  auto expected_bitmap = GenerateBitmapForImage("apng02-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder04) {
  LoadImage("apng04.png");
  auto actual_bitmap = GenerateBitmap(12u);
  auto expected_bitmap = GenerateBitmapForImage("apng04-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder08) {
  LoadImage("apng08.png");
  auto actual_bitmap = GenerateBitmap(12u);
  auto expected_bitmap = GenerateBitmapForImage("apng08-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder10) {
  LoadImage("apng10.png");
  auto actual_bitmap = GenerateBitmap(3u);
  auto expected_bitmap = GenerateBitmapForImage("apng10-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder11) {
  LoadImage("apng11.png");
  auto actual_bitmap = GenerateBitmap(9u);
  auto expected_bitmap = GenerateBitmapForImage("apng11-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder12) {
  LoadImage("apng12.png");
  auto actual_bitmap = GenerateBitmap(9u);
  auto expected_bitmap = GenerateBitmapForImage("apng12-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder14) {
  LoadImage("apng14.png");
  auto actual_bitmap = GenerateBitmap(12u);
  auto expected_bitmap = GenerateBitmapForImage("apng14-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder18) {
  LoadImage("apng18.png");
  auto actual_bitmap = GenerateBitmap(12u);
  auto expected_bitmap = GenerateBitmapForImage("apng18-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoder19) {
  LoadImage("apng19.png");
  auto actual_bitmap = GenerateBitmap(12u);
  auto expected_bitmap = GenerateBitmapForImage("apng19-ref.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, APNGDecoderDisposePrevious) {
  LoadImage("crbug722072.png");
  auto actual_bitmap = GenerateBitmap(3u);
  auto expected_bitmap = GenerateBitmapForImage("green.png");
  VerifyBitmap(actual_bitmap, expected_bitmap);
}

TEST_F(BitmapImageTest, GIFRepetitionCount) {
  LoadImage("three-frames_loop-three-times.gif");
  auto paint_image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(paint_image.repetition_count(), 3);
  EXPECT_EQ(paint_image.FrameCount(), 3u);
}

TEST_F(BitmapImageTest, DecoderAndCacheMipLevels) {
  // Here, we want to test that the mip level calculated by the cc matches
  // exactly a size supported by the decoder. This is to make sure that the
  // rounding used in cc matches the rounding in the decoder. The image in this
  // test is 629x473 and uses 4:2:0 sampling. This means that the MCU is 16x16.
  // Under no memory limits, this image would not be eligible for downscaling by
  // the JPEG decoder because neither dimension is a multiple of 16 (see
  // https://crbug.com/890745). However, we can force the JPEG decoder to
  // support downscaling by limiting the maximum bytes allowed for decoding. If
  // we limit to 315 * 237 * 4 bytes, we'll be forcing the maximum scale factor
  // numerator to be 4 (assuming a denominator of 8).
  platform_->SetMaxDecodedImageBytes(315 * 237 * 4);
  LoadImage("original-cat-420-629x473.jpg");
  auto paint_image = image_->PaintImageForCurrentFrame();

  // The size of the PaintImage is based on the maximum bytes allowed for
  // decoding.
  ASSERT_EQ(315, paint_image.width());
  ASSERT_EQ(237, paint_image.height());

  // Level 0 should match the decoder supported size for scale factor 4/8.
  // Level 1 should match the decoder supported size for scale factor 2/8.
  // Level 2 should match the decoder supported size for scale factor 1/8.
  // Higher levels (smaller sizes) are not supported by the JPEG decoder.
  for (int mip_level = 0; mip_level < 3; ++mip_level) {
    SCOPED_TRACE(mip_level);
    SkISize scaled_size = gfx::SizeToSkISize(cc::MipMapUtil::GetSizeForLevel(
        gfx::Size(paint_image.width(), paint_image.height()), mip_level));
    SkISize supported_size = paint_image.GetSupportedDecodeSize(scaled_size);
    EXPECT_EQ(gfx::SkISizeToSize(supported_size),
              gfx::SkISizeToSize(scaled_size));
  }
}

class BitmapImageTestWithMockDecoder : public BitmapImageTest,
                                       public MockImageDecoderClient {
 public:
  void SetUp() override {
    auto decoder = std::make_unique<MockImageDecoder>(this);
    decoder->SetSize(10u, 10u);
    CreateImage();
    image_->SetDecoderForTesting(
        DeferredImageDecoder::CreateForTesting(std::move(decoder)));
  }

  void DecoderBeingDestroyed() override {}
  void DecodeRequested() override {}
  ImageFrame::Status GetStatus(wtf_size_t index) override {
    if (index < frame_count_ - 1 || last_frame_complete_)
      return ImageFrame::Status::kFrameComplete;
    return ImageFrame::Status::kFramePartial;
  }
  wtf_size_t FrameCount() override { return frame_count_; }
  int RepetitionCount() const override { return repetition_count_; }
  base::TimeDelta FrameDuration() const override { return duration_; }

 protected:
  base::TimeDelta duration_;
  int repetition_count_;
  wtf_size_t frame_count_;
  bool last_frame_complete_;
};

TEST_F(BitmapImageTestWithMockDecoder, ImageMetadataTracking) {
  // For a zero duration, we should make it non-zero when creating a PaintImage.
  repetition_count_ = kAnimationLoopOnce;
  frame_count_ = 4u;
  last_frame_complete_ = false;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), false);

  PaintImage image = image_->PaintImageForCurrentFrame();
  ASSERT_TRUE(image);
  EXPECT_EQ(image.FrameCount(), frame_count_);
  EXPECT_EQ(image.completion_state(),
            PaintImage::CompletionState::kPartiallyDone);
  EXPECT_EQ(image.repetition_count(), repetition_count_);
  for (size_t i = 0; i < image.GetFrameMetadata().size(); ++i) {
    const auto& data = image.GetFrameMetadata()[i];
    EXPECT_EQ(data.duration, base::Milliseconds(100));
    if (i == frame_count_ - 1 && !last_frame_complete_)
      EXPECT_FALSE(data.complete);
    else
      EXPECT_TRUE(data.complete);
  }

  // Now the load is finished.
  duration_ = base::Seconds(1);
  repetition_count_ = kAnimationLoopInfinite;
  frame_count_ = 6u;
  last_frame_complete_ = true;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), true);

  image = image_->PaintImageForCurrentFrame();
  ASSERT_TRUE(image);
  EXPECT_EQ(image.FrameCount(), frame_count_);
  EXPECT_EQ(image.completion_state(), PaintImage::CompletionState::kDone);
  EXPECT_EQ(image.repetition_count(), repetition_count_);
  for (size_t i = 0; i < image.GetFrameMetadata().size(); ++i) {
    const auto& data = image.GetFrameMetadata()[i];
    if (i < 4u)
      EXPECT_EQ(data.duration, base::Milliseconds(100));
    else
      EXPECT_EQ(data.duration, base::Seconds(1));
    EXPECT_TRUE(data.complete);
  }
}

TEST_F(BitmapImageTestWithMockDecoder,
       AnimationPolicyOverrideOriginalRepetitionNone) {
  repetition_count_ = kAnimationNone;
  frame_count_ = 4u;
  last_frame_complete_ = true;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), false);

  PaintImage image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), repetition_count_);

  // In all cases, the image shouldn't animate.

  // Only one loop allowed.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyAnimateOnce);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationNone);

  // No animation allowed.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyNoAnimation);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationNone);

  // Default policy.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyAllowed);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationNone);
}

TEST_F(BitmapImageTestWithMockDecoder,
       AnimationPolicyOverrideOriginalRepetitionOnce) {
  repetition_count_ = kAnimationLoopOnce;
  frame_count_ = 4u;
  last_frame_complete_ = true;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), false);

  PaintImage image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), repetition_count_);

  // If the policy is no animation, then the repetition count is none. In all
  // other cases, it remains loop once.

  // Only one loop allowed.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyAnimateOnce);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationLoopOnce);

  // No animation allowed.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyNoAnimation);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationNone);

  // Default policy.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyAllowed);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationLoopOnce);
}

TEST_F(BitmapImageTestWithMockDecoder,
       AnimationPolicyOverrideOriginalRepetitionInfinite) {
  repetition_count_ = kAnimationLoopInfinite;
  frame_count_ = 4u;
  last_frame_complete_ = true;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), false);

  PaintImage image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), repetition_count_);

  // The repetition count is determined by the animation policy.

  // Only one loop allowed.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyAnimateOnce);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationLoopOnce);

  // No animation allowed.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyNoAnimation);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), kAnimationNone);

  // Default policy.
  image_->SetAnimationPolicy(
      mojom::blink::ImageAnimationPolicy::kImageAnimationPolicyAllowed);
  image = image_->PaintImageForCurrentFrame();
  EXPECT_EQ(image.repetition_count(), repetition_count_);
}

TEST_F(BitmapImageTestWithMockDecoder, ResetAnimation) {
  repetition_count_ = kAnimationLoopInfinite;
  frame_count_ = 4u;
  last_frame_complete_ = true;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), false);

  PaintImage image = image_->PaintImageForCurrentFrame();
  image_->ResetAnimation();
  PaintImage image2 = image_->PaintImageForCurrentFrame();
  EXPECT_GT(image2.reset_animation_sequence_id(),
            image.reset_animation_sequence_id());
}

TEST_F(BitmapImageTestWithMockDecoder, PaintImageForStaticBitmapImage) {
  repetition_count_ = kAnimationLoopInfinite;
  frame_count_ = 5;
  last_frame_complete_ = true;
  image_->SetData(SharedBuffer::Create(base::span_from_cstring("data")), false);

  // PaintImage for the original image is animated.
  EXPECT_TRUE(image_->PaintImageForCurrentFrame().ShouldAnimate());

  // But the StaticBitmapImage is not.
  EXPECT_FALSE(image_->ImageForDefaultFrame()
                   ->PaintImageForCurrentFrame()
                   .ShouldAnimate());
}

class BitmapHistogramTest : public BitmapImageTest {
 protected:
  template <typename MetricType>
  void ExpectImageRecordsSample(const char* filename,
                                const char* name,
                                MetricType bucket,
                                int count = 1) {
    base::HistogramTester histogram_tester;
    LoadImage(filename);
    histogram_tester.ExpectUniqueSample(name, bucket, count);
  }
};

TEST_F(BitmapHistogramTest, DecodedImageType) {
  ExpectImageRecordsSample("green.jpg", "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kJPEG);
  ExpectImageRecordsSample("palatted-color-png-gamma-one-color-profile.png",
                           "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kPNG);
  ExpectImageRecordsSample("animated-10color.gif", "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kGIF);
  ExpectImageRecordsSample("webp-color-profile-lossy.webp",
                           "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kWebP);
  ExpectImageRecordsSample("wrong-frame-dimensions.ico",
                           "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kICO);
  ExpectImageRecordsSample("gracehopper.bmp", "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kBMP);
#if BUILDFLAG(ENABLE_AV1_DECODER)
  ExpectImageRecordsSample("red-full-ranged-8bpc.avif",
                           "Blink.DecodedImageType",
                           BitmapImageMetrics::DecodedImageType::kAVIF);
#endif  // BUILDFLAG(ENABLE_AV1_DECODER)
}

TEST_F(BitmapHistogramTest, DecodedImageDensityKiBWeighted) {
  {
    // Test images that don't report any density metrics.
    base::HistogramTester histogram_tester;
    LoadImage("rgb-jpeg-red.jpg");           // 64x64
    // 500x500 but animation is not reported.
    LoadBlinkWebTestsImage("webp-animated-large.webp");
#if BUILDFLAG(ENABLE_AV1_DECODER)
    LoadImage("red-full-ranged-8bpc.avif");  // 3x3
    // 159x159 but animation is not reported.
    LoadBlinkWebTestsImage("avif/star-animated-8bpc.avif");
    // 800x800 but 10-bit images are not reported.
    LoadBlinkWebTestsImage(
        "avif/red-at-12-oclock-with-color-profile-10bpc.avif");
#endif
    LoadImage("animated-10color.gif");       // 100x100 but GIF is not reported.
    histogram_tester.ExpectTotalCount(
        "Blink.DecodedImage.JpegDensity.KiBWeighted", 0);
    histogram_tester.ExpectTotalCount(
        "Blink.DecodedImage.WebPDensity.KiBWeighted2", 0);
#if BUILDFLAG(ENABLE_AV1_DECODER)
    histogram_tester.ExpectTotalCount(
        "Blink.DecodedImage.AvifDensity.KiBWeighted2", 0);
#endif
  }

  // 439x154, 23220 bytes --> 2.74 bpp, 23 KiB (rounded up)
  ExpectImageRecordsSample("cropped_mandrill.jpg",
                           "Blink.DecodedImage.JpegDensity.KiBWeighted", 274,
                           23);

  // 320x320, 74017 bytes --> 5.78, 72 KiB (rounded down)
  ExpectImageRecordsSample("blue-wheel-srgb-color-profile.jpg",
                           "Blink.DecodedImage.JpegDensity.KiBWeighted", 578,
                           72);

  // 800x800, 19436 bytes --> 0.24, 19 KiB
  ExpectImageRecordsSample("webp-color-profile-lossy.webp",
                           "Blink.DecodedImage.WebPDensity.KiBWeighted2", 24,
                           19);

#if BUILDFLAG(ENABLE_AV1_DECODER)
  // 840x1120, 18769 bytes --> 0.16, 18 KiB
  ExpectImageRecordsSample(
      "happy_dog.avif", "Blink.DecodedImage.AvifDensity.KiBWeighted2", 16, 18);
#endif  // BUILDFLAG(ENABLE_AV1_DECODER)
}

}  // namespace blink